Metal-working machine.



B. M. W. HANSON.

METAL womzmq MACHINE.

APPLICATION FILED DEG.23,1908.

Patented Nov. 23, 1909.

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BM Wfiansan 3 his Attorneyas', J

UNITED sra'rnsgngrngnr OFFICE.

BENGT M. -W. HANSON, OF HARTFORD; CONNECTICUT, ASSIGNOR T PRATT 8c WHIT-NEY COMPANYy OF HARTFORD, CONNECTICUT, A CORPORATION- OF NEW JERSEY.

METAL-WORKING MACHINE.

. ,Speciflcation of Letters lPatent. P te t d Nov. 23, 1909.

I Application filed December 23, 1908. Serial No. 468,849.

To all whom it may concern:

Be it known that I, BENGT M. WV. Hanson, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in Metal-W Vorking Machines, of which the following is aspec fication.

- returned to the latter without inany wise afli'ectin the previouslymade adjustment of said sli e.

In the drawings accompanying and form? ing part of the presentspecification I re aresent in detail one form of embodiment o theinvention which to enable-those skilled in the art to practice saidinvention will be fully set forth in the following description while thenovelty of the invention will be included in the claims succeeding saiddescription.

Referring to said drawings, Figure l is a transverse sectional. view ofan engine lathe provided. with slide actuating mechanism comprising myinvention, and, Fig; 2 is a transverse section on the line 2'2 of said laike characters refer to like parts in both views. p

In the drawings I have illustrated portion of the bed'2 of an enginelathe the same being equipped with suitable ways for the sup-' port of acarriage as 3 which is shown as supporting a cross slide 4, furnishedwith a nut as 5 rigidwith said slide. Cooperative with said nut is afeed-screw (3 shown as provided with a handle'or crank arm 7 at itsouter end by turning which said cross slide can be moved back andforward or away from or toward the work, said nut and screw beinggenerally relied upon toeffect'the adjustmentlof the said cross slidewith respect to the work. Said cross slide is provided with thecustomary appurtenances including the tool post 8. In addition to thesaid feedscrew and nutfor efiecting the adjustment of the cross slide Iprefer to provide a second nut and screw for also-operating the crossslide the second nut and screw operating independently of the otherscrew and nut and also without changing. the relation between said lastmentioned parts. The second screw and nut for illustration may beutilized to move the cross slide away from the work after the carriage 3has finished its advancing stroke, a out having been made by the tool onthe tool post 8. What I have termed the second screw and nut may berelated with the said cross slide in various ways although I find thatthe nut can to advantage directly cooperate with the said feed-' screw(3 although as will be clear the relation is not essential although itis one that is quite compact.

A bearing 9 is shown as surrounding thefeed-screw 7 near the outer endthereot and as externally threadedito present a secondary feed screw,the feed-screw 7 constituting a primary or adjusting one. terms primaryand so merely tor convenience and do not intend In using the to indicatethat one is subsidiary or suboragainst the gear 10 and the rigid collar11 both carried by said feed-screw 7. It is secondary I dothereforeapparent that when' an end thrust is given to the teed-screw 9 thefeed-screw 7 will be also operated to correspondingly operate'the crossslide t. The said screw or hearing 9 is therefore ieci'procative and itin turn reciprocates the feed-screw 7. The

gear or barrel pinion 10 is connected with the feed-screw 7 in anydesirable manner and forms part ot the POWQY-OPOI'tLlIGd mechanism forreciprocating the carriage.

The 'iut for operating the screw 9 is denoted by 12 and it is shown assupported by and held against movement bodily or with the screw 'by aboxing or bracket as 13 connected in some fixed manner with the carriage3. For instance the hub of said boxing or bracket 13 may bese't into anopening in the carriage and held therein'by one or more screws as 14.The screw 9 extends through the boxing 13 and. the latter has a .bemoved outward or inward and this result can be accomplished withoutafiectin the relation between said feed-screw 6 and its cotiperating nut5 the conseguence bein that if an adjustment has been made it will notbe affected by such opei'ation of the screw 9.

f Any suitable means may be provided for turning the nut 12 formovingthe screw 9 in an endwise direction; for this purpose I have shown ahandle 13 having a threaded stud 14 at its inner end tapped into saidnut and adapted to traverse a slot as 15 in said boxing 13 the slotbeing sufficiently long as to provide for the necessary throw of thecross slide b'oth outwardly and inwardly and the' end walls of the saidslot constituting suitable limitin means for stopping the said handle atthe kinds of its two strokes. The slot is of a definite lengthpreferably by reason of which a definite movement of said cross slidewhen shifted through the agency of the screw 9 and nut 12 is assured.The handle 13 is in convenient reach of'the operator using the handle 7.

To prevent accidental shifting movement of the handle 13' due to itsweight, when in either of its shifted positions I prefer to provide somepositive means to hold said handle in its two extreme shifted positions.For this purpose I have represented a spring plunger 16 carried by theboxing 13 and the pointed or taper tip of which is adapted toalternately enter seats or sockets each clenoted by 17 in the peripheryof said nut. While the plunger holds the said handle 13 securely againstaccidental movement it is a simple matter to shift said handle by manual force to effect the operation of the cross slide 4. I reventoverthrow of the cross slide when t e same is being returned to anadjusted position and also solidly hold the same in said adjustedposition whereby accuracy and precision in results are possible.

In making the adjustments which are usual in lathes I prefer) to relyupon the feed-screw 6 and nut 5 which operate after the familiar fashionto adjust the tool with respect 'to the work. During the action'of thefeed screw 7 it turns in the sleeve nuae but the two parts have norelative movement. Should it become necessary at an time to move thetool away from the wor without affecting the precise and carefullyregulated relation between said nut and feed-screw this can beaccomplished instantly and easily by the manipulation of ghe handle 13in the manner previously set orth.

In practice I will provide means of apositive nature to prevent turningof theelongated sleeve or screw 9 and in the drawings I have illustrateda means for this purpose as will now appear. Within the box 13 I haveshown an upstanding pin 18 constituting a key which is adapted to enterthe keyway or longitudinal channel 19 in the plain or unthreaded portionof said sleeve 19. The latter as will be evident need not be nee--essarily threaded throughout its entire extent, only the forward portionthereof being represented as threaded.

I do not limit myself to the construction disclosed by the presentdrawings and description for many variations may be ado ted within thescope of my invention. or

example it is not essential that the two screws and nuts be arranged ashereinbefore de=' scribed thisbeing one illustration wherein a departuremay bewhad from the particular onto said feed-screw for reciprocatingthe latter, a boxing having a slot and a bore in-' tersecting said slotto receive said sleeved screw, and a nut set into said slot and fittedto said sleeved screw. Y

In testimony whereof I aflix my signature in presence of two witnesses.

BENGT M. W. HANSON.

Witnesses:

HEATH SUTHERLAND, F. E. ANDERSON.

